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Sonic Black Hole Traps Sound Waves

 
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Old 08-25-2009, 12:50 AM   #1
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Sonic Black Hole Traps Sound Waves



Sound Vacuum | Discovery News Video

http://dsc.discovery.com/news/2009/0...lack-hole.html

by Eric Bland, Discovery News

June 17, 2009 -- A black hole created by Israeli scientists won't destroy Earth, but it could make our planet just a little bit less noisy.
Using Bose-Einstein condensates, the scientists created a black hole for sound. The new research could help scientists learn more about true black holes and help confirm the existence of as-yet to be discovered Hawking radiation.

"It's like a black hole because waves get sucked in and can't escape," said Jeff Steinhauer, a scientist at the Israel Institute of Technology and the corresponding author of the article recently posted on the ArXiv.org pre-print Web page. "But in this case we use sound waves instead of light."

To create the sonic black hole, the scientists first had to create the Bose-Einstein condensate, a cloud of atoms cooled to almost absolute zero that acts like a light wave. The Israeli scientists actually created two clouds of rubidium 87 atoms cooled to 50 nano Kelvins and separated by a small gap.
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Old 08-25-2009, 12:54 AM   #2
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Re: Sonic Black Hole Traps Sound Waves


I could have used one of those today.I was home with my girls today.2 1/2 and 6...Talk about loud!

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Old 08-25-2009, 01:07 AM   #3
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Re: Sonic Black Hole Traps Sound Waves


Now if they could only figure out how to suck in "how much" threads and hack CL ads.
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Old 08-25-2009, 01:47 AM   #4
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Re: Sonic Black Hole Traps Sound Waves


Cool. Soon enough they'll be creating actual black holes as weapons of "mass" destruction.

Pun intended
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Old 08-25-2009, 02:49 AM   #5
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Re: Sonic Black Hole Traps Sound Waves


wow. that is so cool man. Thanks for posting these threads man
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Old 08-25-2009, 10:29 AM   #6
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Re: Sonic Black Hole Traps Sound Waves


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Originally Posted by Winchester View Post
Cool. Soon enough they'll be creating actual black holes as weapons of "mass" destruction.

Pun intended
K, that was just bad.
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Old 08-25-2009, 01:06 PM   #7
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Re: Sonic Black Hole Traps Sound Waves


Lab geek AHOLES!! That's just thier propaganda. "Soundwaves" my A.

THAT'S the real reason tape measures,pencils,speed squares,razor knives etc. go missing! I KNEW IT!!!!!!! CALL ME CRAZY WILL YA!!???
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Old 08-25-2009, 07:03 PM   #8
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Re: Sonic Black Hole Traps Sound Waves


Well i now have an excuse why i never hear what my wife says.
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Old 08-25-2009, 07:19 PM   #9
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Re: Sonic Black Hole Traps Sound Waves


They should install them in the bathrooms at truck stops, greasy spoon diners and taco bell
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Old 08-25-2009, 08:17 PM   #10
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Re: Sonic Black Hole Traps Sound Waves


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They should install them in the bathrooms at truck stops, greasy spoon diners and taco bell
I agree I just wished I didn't get the visual!
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Old 08-25-2009, 08:18 PM   #11
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Re: Sonic Black Hole Traps Sound Waves


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They should install them in the bathrooms at truck stops, greasy spoon diners and taco bell

If they put that in my bathroom it would collapse in on it's self after i let one go.
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Old 08-25-2009, 08:27 PM   #12
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If they put that in my bathroom it would collapse in on it's self after i let one go.
Statements like THAT^^^^ Are why the saying TMI was put into effect!

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Old 08-25-2009, 08:34 PM   #13
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Re: Sonic Black Hole Traps Sound Waves


Let's see ??? If - Then ???

Ed

The gap is key. Known as a "density inversion," the gap creates a region of space with a very low density, allowing atoms to flow between the two clouds virtually unimpeded at nearly three millimeters per second. That's more than four times the speed of sound.

Scientists observed the sonic black hole for a total of eight milliseconds using lasers. Since it's a sonic black hole, not a true black hole, light waves, which travel much faster than sound waves, can still escape.

First predicted by the physicist Steven Hawking in 1974, Hawking radiation is radiation is theoretically emitted from just outside the event horizon of a black hole. Its existence would mean matter can escape from a true black hole.

If the amount of matter being ejected from the black hole is greater than the amount of incoming mass, the black hole will eventually evaporate.





So, based on the Density Inversion and the now known fact that Light Waves can be observed to escape from a Black hole, then if similar physics apply, the Hawking Radiation may also some day come to be known and observed.....

If that is true, then could that mean that at some point in time, all Matter that was swallowed up by the Black Hole could potentially be expelled all at once?

What would the addition of some very vast and significant amounts of matter do to the balance of the universes affected?

Would that then be akin to filling up a baloon too much and observing it till it pops?

Could that be a basis for an individual universes Big Bang?



Okay, the formula wore off now and I forget what I was asking here.



Does anyone else with the right background have a theory to hypothesize the results?



Ed
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Old 08-25-2009, 08:46 PM   #14
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Re: Sonic Black Hole Traps Sound Waves


Quote:
Originally Posted by Ed the Roofer View Post
Let's see ??? If - Then ???

Ed

The gap is key. Known as a "density inversion," the gap creates a region of space with a very low density, allowing atoms to flow between the two clouds virtually unimpeded at nearly three millimeters per second. That's more than four times the speed of sound.

Scientists observed the sonic black hole for a total of eight milliseconds using lasers. Since it's a sonic black hole, not a true black hole, light waves, which travel much faster than sound waves, can still escape.

First predicted by the physicist Steven Hawking in 1974, Hawking radiation is radiation is theoretically emitted from just outside the event horizon of a black hole. Its existence would mean matter can escape from a true black hole.

If the amount of matter being ejected from the black hole is greater than the amount of incoming mass, the black hole will eventually evaporate.





So, based on the Density Inversion and the now known fact that Light Waves can be observed to escape from a Black hole, then if similar physics apply, the Hawking Radiation may also some day come to be known and observed.....

If that is true, then could that mean that at some point in time, all Matter that was swallowed up by the Black Hole could potentially be expelled all at once?

What would the addition of some very vast and significant amounts of matter do to the balance of the universes affected?

Would that then be akin to filling up a baloon too much and observing it till it pops?

Could that be a basis for an individual universes Big Bang?



Okay, the formula wore off now and I forget what I was asking here.



Does anyone else with the right background have a theory to hypothesize the results?



Ed
You lost me at "The".
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Old 08-25-2009, 08:59 PM   #15
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Re: Sonic Black Hole Traps Sound Waves


The results of what. And I'm not sure that light waves have been observed to escape the singularity. What happens in a black hole can only at this point be theory. X rays and gamma rays produced by the black holes "feeding" excite the matter in jets expelled at both "ends" but I believe it's still being debated whether light is actually able to leave the gravity well.

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